Builds a list of reachable Bitcoin nodes by impersonating one and continuously sending getaddr messages to other known nodes.
Supports all networks: mainnet, testnet4, signet, regtest.
Takes a while: a handshake must be made with a potential peer in order for it to be considered valid and added to the list.
~$ cargo run -- --net testnet4
[2024-10-24 21:07:05 INFO getaddress] starting handshake with 203.132.94.196:48333
[2024-10-24 21:07:05 INFO getaddress] starting handshake with 85.208.69.71:48333
[2024-10-24 21:07:05 INFO getaddress] successful handshake with 203.132.94.196:48333
[2024-10-24 21:07:05 INFO getaddress] new peer discovered @ 203.132.94.196:48333
[2024-10-24 21:07:05 INFO getaddress] successful handshake with 85.208.69.71:48333
[2024-10-24 21:07:05 INFO getaddress] new peer discovered @ 85.208.69.71:48333
[2024-10-24 21:07:05 INFO getaddress] 51 non-unique peers in the db
[2024-10-24 21:07:06 INFO getaddress] starting handshake with 103.99.171.211:48333
[2024-10-24 21:07:06 INFO getaddress] successful handshake with 103.99.171.211:48333
[2024-10-24 21:07:06 INFO getaddress] new peer discovered @ 103.99.171.211:48333
[2024-10-24 21:07:06 INFO getaddress] 52 non-unique peers in the db
[2024-10-24 21:07:15 INFO getaddress] starting handshake with 176.112.177.138:48333
[2024-10-24 21:07:15 INFO getaddress] successful handshake with 176.112.177.138:48333
[2024-10-24 21:07:15 INFO getaddress] new peer discovered @ 176.112.177.138:48333
[2024-10-24 21:07:16 INFO getaddress] starting handshake with 103.165.192.214:48333
[2024-10-24 21:07:17 INFO getaddress] successful handshake with 103.165.192.214:48333
[2024-10-24 21:07:17 INFO getaddress] new peer discovered @ 103.165.192.214:48333
^C[2024-10-24 21:07:19 INFO getaddress] received SIGINT. shutting down, this may take a while...
[2024-10-24 21:07:19 INFO getaddress] starting handshake with 2001:df6:7280::92:207:48333
[2024-10-24 21:07:19 INFO getaddress] successful handshake with [2001:df6:7280::92:207]:48333
[2024-10-24 21:07:19 INFO getaddress] new peer discovered @ [2001:df6:7280::92:207]:48333
[2024-10-24 21:07:19 INFO getaddress] 55 non-unique peers in the db
[2024-10-24 21:07:21 INFO getaddress] deduped peers list: from 55 to 44 peers
[2024-10-24 21:07:21 INFO getaddress] discovered unique 44 peers in 00h01m12s
[2024-10-24 21:07:21 INFO getaddress] looking up peer's ASNs...
[2024-10-24 21:07:21 INFO getaddress] peers ASNs filled!
[2024-10-24 21:07:21 INFO getaddress] 44 peers written to "output/testnet4/testnet4-20241024210608.txt"
[2024-10-24 21:07:21 INFO getaddress] done!
~$ cat output/testnet4/testnet4-2024102421021.txt
2.59.134.244:48333 / AS58212 / dataforest GmbH
18.189.156.102:48333 / AS16509 / AMAZON-02
45.142.17.140:48333 / AS206238 / Freedom Internet BV
50.126.96.22:48333 / AS20055 / AS-WHOLESAIL
89.117.52.73:48333 / AS51167 / Contabo GmbH
103.99.168.203:48333 / AS54415 / WIZ K.K.
103.99.168.204:48333 / AS54415 / WIZ K.K.
103.99.168.205:48333 / AS54415 / WIZ K.K.
103.99.168.207:48333 / AS54415 / WIZ K.K.
103.99.168.210:48333 / AS54415 / WIZ K.K.
103.99.168.212:48333 / AS54415 / WIZ K.K.
103.99.168.214:48333 / AS54415 / WIZ K.K.
103.99.171.204:48333 / AS54415 / WIZ K.K.
103.99.171.207:48333 / AS54415 / WIZ K.K.
103.99.171.208:48333 / AS54415 / WIZ K.K.
103.99.171.209:48333 / AS54415 / WIZ K.K.
103.99.171.212:48333 / AS54415 / WIZ K.K.
103.99.171.213:48333 / AS54415 / WIZ K.K.
103.99.171.214:48333 / AS54415 / WIZ K.K.
103.165.192.202:48333 / AS142052 / Mempool Space K.K.
103.165.192.207:48333 / AS142052 / Mempool Space K.K.
148.51.196.40:48333 / AS12025 / IMDC-AS12025
186.233.184.40:48333 / AS262287 / Latitude.sh LTDA
2001:df6:7280::92:204:48333 / AS142052 / Mempool Space K.K.
2001:df6:7280::92:208:48333 / AS142052 / Mempool Space K.K.
2001:df6:7280::92:211:48333 / AS142052 / Mempool Space K.K.
2001:df6:7280::92:212:48333 / AS142052 / Mempool Space K.K.
2401:b140:2::92:202:48333 / AS54415 / WIZ K.K.
...
This is the sequence diagram for the handshake and address exchange:
LOCAL REMOTE
┬ ┬
| version |
|------------------>|
| |
| version |
|<------------------|
| |
| verack |
|<------------------|
| |
| verack |
|------------------>|
| |
| getaddr |
|------------------>|
| |
| addr |
|<------------------|
┴ ┴
All P2P messages have a standard format, consisting of:
- Header (24 bytes)
- Payload (Variable lenght, including 0)
┌──────────────┬─────────────────┬──────┬──────────────────────────────────────────────┐
│ Field │ Format │ Size │ Description │
├──────────────┼─────────────────┼──────┼──────────────────────────────────────────────┤
│ Magic Bytes │ bytes │ 4 │ Network-specific magic bytes │
│ Command │ ascii bytes │ 12 │ ASCII-encoded command |
│ Size │ little-endian │ 4 │ Payload size │
│ Checksum │ bytes │ 4 │ Checksum (first 4 bytes of HASH256(payload)) |
└──────────────┴─────────────────┴──────┴──────────────────────────────────────────────┘
┌──────────────┬─────────────────┬──────┬──────────────────────────────────────────────┐
│ Field │ Format │ Size │ Description │
├──────────────┼─────────────────┼──────┼──────────────────────────────────────────────┤
│ IP count │ compact size │ * │ IP count encoded in compactSize │
│ IP addresses │ Vec<network_IP> | * │ IP address entries (format below) │
└──────────────┴─────────────────┴──────┴──────────────────────────────────────────────┘
┌──────────────┬─────────────────┬──────┬──────────────────────────────────────────────┐
│ Field │ Format │ Size │ Description │
├──────────────┼─────────────────┼──────┼──────────────────────────────────────────────┤
│ Time │ little-endian │ 4 │ Unix Epoch time │
│ Services │ little-endian | 8 │ Advertised services │
| IP address | big-endian | 16 | IPv6 or IPv6-wrapped-IPv4 |
| Port | big-endian | 2 | Port |
└──────────────┴─────────────────┴──────┴──────────────────────────────────────────────┘
- Use GeoLite2-ASN.mmdb to determine AS's stakes in node hosting
- Add
addrv2support - Add Tor support
- Add I2P support
- Add CJDNS supoort
- Add Yggdrasil support